Car-ventilator.



No. 760,795. I l PATENTBDMAY 24, 1904.

' f R. siLAwRBNcE.' GAR VENTILATOR.

V APPLICATION FILED A`UG.14, 1903. v

ZSHEETS-SHEET 2.

N0 MODEL.

L mo.. wAsHxNcTcN. n c.

- I This invention relates to a car-ventilator of the thimble, it isobvious that the entire mouth- 4 5 washer 7, of leather or other packing'mateof the drawings. l

No. 760,795. v Patented May 24, 1904.

UNITED STATES PATENT OEEICE. lROBERT S. LAVVRENOE, BOSTON,MASSACHUSETTS,ASSfGrNOR TOAOON- SOLIDATED INVENTORS -CORPORATION, OFBOSTON, MASSACHUSETTS, A' ooEPoEATIoN or s oUTH DAKoTA.,

CAR-VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 760,795, dated May 24,1904.

' Application med August 14, 1903. ,semina 169,512. (Numan.)

Z'o all whom t 11mg/ concern.' 9, in which case the stern 6 will bebranched,

Be it known that I, ROBERT S. LAWRENCE, a and one branch, 10, will leadto each mouth'- 5o citizen of the United States, residing at Bospiece.The two mouthpieces terminate in the ton, in the county of Suffolk andState of Massingle plate 11, which has apertures therein 5 sachusetts,have invented an Improvement in to correspond withithe opening in themouth- Oar-Ventilators, of which. the following--depieces. Itismyintention to cast or'otherscription, in yconnection with'theaccompanywise form the plate 11, the mouthpieces 8 and 5 5 ing drawings,is a specification, like numerals 9, and the branch stem 6all in onepiece. Since on the drawings representing like parts. the stem 6 merelysits in the enlarged bore of that class wherein `the necessary suctionfor piece or cowl structure can be turned about drawing the foul airfrom the 'interior of the said stem as an axis and made to face toward60 car is produced by the movementof the car either end of the car. i

itself. When the device is in operation, the mouth- 1,5 The particu-larfeatures wherein the invenpiece will be placed to open toward the backtion resides will be more fully hereinafter deof the car, or in adirection opposite to the scribed and then pointed out in the claims.movement of the car. 'When in this position, 65

Figure 1 is a side elevation of a car having tbe'motion of the carwillcreate sufficient sucmy improved ventilator applied thereto. Fig. tion,so that the air in the car will be drawn 2O 2-is a top plan View of theswiveled double lthrough the perforations in the pipe 3 and mouthpieceof the ventilator. Fig. Sis asec- 4out through the mouthpieces. To holdthe tion `through the top of the car on the line mouthpiece in eitheradjusted position, I have 70 Fig.v 1.y Fig. L is a modification; andFig. 5 provided the platell at each end with a catch is asection throughthe roof of the car and on 16, and lI place coperating'latches 17 on thean enlarged scale, showing further details of top of the car. With thisconstruction the construction. i mouthpiece may be swung in to faceeither 3 designatesa pipe which extends longitudirection, and when inproper position one of 75 dinally of the car on its interior and whichis the latches 17 will automatically engage the preferably situated nearthe top of the car, corresponding catch'16', and thus hold said wherethe impure air accumulates; This pipe mouthpiece properly positioned.The latches is open to the interior of the car, preferably are shown ashaving knobs or thumb-pieces by making it perforated, as best shown inFig. 18 thereon by means of which they may be 8O 5, and at one or moreplaces it extends through released. the roof of the car. Swiveled toeach exposed 19 designates a damper situated in the stem end of thepipeis a vacuum or suction moutho f the mouthpiece. This damper is'mounted piece or cowl, which operates to create the on a rock-shaft 20,which is suitably journaled necessary suction during movement of theear. in the thimble and which has extending from In this embodiment ofmy invention the pipe its end the arms 22, from each of which de- 3 isscrewed into an ordinary T 4, which in pends an operating-cord 21. Thesecords pass 4 0 turn is screwed into athimble 5, which passes through theroof of the car, so that they can through the car-roof. The upper end ofthe be operated fromthe interior thereof. A pull thimble is providedwith an enlarged bore, on one of the cords will open the damper, whichreceives the stern 6A of the vacuumwhile a pull on the other cord willclose the mouthpiece, said stem resting upon a suitable damper, as willbe obvious from an inspection rial. I prefer to employ the double mouth-To permit the stem 6 to turn in the thimble, piece or cowl, (bestillustrated in Fig. 2,) I provide said stem with a slot extendingparwhich-comprises the two mouthpieces 8 and tially about the same,through which slot the rock-shaft 20 extends, said slot permitting afree turning movement of the stem without disturbing the damper.

I have herein shown each of the pipes 8 as having a mouthpiece connectedthereto at each end thereof, said mouthpieces being situated at oppositeends of the car. One or more pipes 3 with its mouthpieces may be emiployed, according to the size and speed of the car. I have hereinillustrated two such pipes, one at each side of the car at its upperend, and each pipe has a mouthpiece at each end thereof, as describedabove. The pipes and ventilator may be located in any convenientposition on the top of the car.

In Fig. 4 I have illustrated a slightly-different form of mouthpiece,wherein the plate 11 is circular instead of rectangular, as shown inFig. 3. In other respects the modification shown in Fig. 4 is the sameas the construction already described.

In the operation of the device the rapid movement of the car through theair causes a partial vacuum to be formed in each mouthpiece, with theresult that the air is drawn from the interior of the car through theperforations in the pipe 3 and out through the mouthpieces. Since theheated impure air always rises to the top of the ear, it follows thatwith my ventilator it is possible to take such air out of the car asfast as it rises to the top thereof, with the result that the air in thecar may be kept absolutely pure.

Various changes may be made in the construction of the device withoutdeparting from the invention expressed in the appended claims.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. In a car-ventilator, a perforated pipe extending longitudinally-ofthe car on its interior, a thimble secured to said pipe and extendingvertically through the car-roof, a horizontally-arranged suctionmouthpiece or cowl having a vertical stem or neck which is swivel'ed toSaid thimble, a pivoted damper supported by said thimble and situatedwithin the stem or neck, and means on the interior of the car foroperating said damper.

2. In a car-Ventilator, a perforated pipe extending longitudinally ofthe car on its interior, a thimble secured to said pipe and extendingvertically through the car-roof, a horizontally-arranged suctionmouthpiece or cowl having a vertical stem or neck which sets into theupper end of the thimble and is swivelcd thereto, and a damper for thecowl, said damper operating to hold the cowl from vertical movement withreference to the thimble.

3. In a car-Ventilator, a thimble passing through the car-roof, asuction mouthpiece or cowl, having a vertical stem or neck, which setsinto the upper end of the thimble and is swiveled therein, apivoteddamper within said Stem, said damper having a stem extending through aslot in the cowl-stem whereby the cowl may be turned.

4. In a car-ventilator, a thimble [ixcdly secured to and passing throughthe car-roof, a suction mouthpiece or cowl having a Vertical stem orneck setting into the upper end of the thimble and supported thereby forturning movement, a damper within the neck of the cowl, ormouthpiece,'said damper having a stem extending through acircumferential slot in the neck of the cowl and through an aperture ofthe thimble.

5. In a car-ventilator` a cowl comprising a plate having two apertures,two cone-shaped suction-mouthpieces extending laterally from said plate,said mouthpieces being alined with said apertures and cach havingcommunication with a Vertical cowl stem or neck, and a thimble extendingthrough ,the car-roof and to which said neck is swiveled,

6. In a car-ventilator, a cowl comprising a plate having two apertures,two cone-shaped suction-mouthpieces extending laterally from said plate,said mouthpieces being alined with said apertures and each havingcommunication with a vertical cowl stem or neck, a thimble extendingthrough the car-roof and to which said neck is swiveled, and alocking-lug scoured to said plate, and a locking-latch on the car-roofto cooperate with said lug and hold the cowl in its adjusted position.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ROBERT S. LAWRENCE.

Witnesses:

LoUIs C. SMITH, MELVILLE M. MAKEEVER.

